The MARVEL logo in this building set is assembled from red and white bricks. When kids press three separate buttons on top of the logo, Hulk, Thor, Iron Man, Black Widow, and Captain America burst out of the Marvel model to unleash action-packed Avengers fun right before their eyes. Each minifigure also easily returns to its original position. For added digital building fun, the intuitive LEGO Builder app is available. Within the app, builders can zoom in and rotate 3D model views and track their building progress.